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DOI	10.1016/j.epsl.2020.116383
	Late Pliocene onset of the Cona rift, eastern Himalaya, confirms eastward propagation of extension in Himalayan-Tibetan orogen
	Bian S.; Gong J.; Zuza A.V.; Yang R.; Tian Y.; Ji J.; Chen H.; Xu Q.; Chen L.; Lin X.; Cheng X.; Tu J.; Yu X.
发表日期	2020
ISSN	0012821X
卷号	544
英文摘要	Several competing hypotheses have been proposed to explain east-west extension observed across the Himalayan orogen, based primarily on observations from the western and central Himalaya. They make predictions for the temporal and spatial patterns of deformation in the eastern Himalaya. These tectonic models include radial spreading or oroclinal bending of the Himalayan arc, oblique convergence of the Indian continent, tearing or lateral detachment of the Indian slab and eastward flow of lithosphere. Here, for the first time we constrain the activity history of the Cona rift, the only north-trending rift currently recognized in the eastern Himalaya, based on biotite and K-feldspar 40Ar/39Ar and zircon and apatite (U–Th)/He thermochronology, to evaluate these proposed rifting mechanisms. Low-temperature thermochronological results suggest that the Cona rift is the youngest rift system in the Himalayas: after a slow phase of exhumation since ∼14 Ma (∼0.2–0.13 mm/yr), normal faulting initiated here at ∼3.0–2.3 Ma with a fault slip rate of ∼3.8–1.6 mm/yr and a horizontal extension magnitude of ∼2–5 km. Analysis of rifting across the Himalayas shows that rift initiation ages young eastward, which is matched by eastward decreasing rift-extension magnitudes. Monotonically eastward younging rift development is consistent with the tectonic model involving eastward lithospheric flow driven by Indian slab dynamics and coupled asynchronous gravitational potential energy gradients. © 2020 Elsevier B.V.
关键词	Cona rift east-west extension eastward younging rifting Himalaya low-temperature thermochronology
英文关键词	Feldspar; Mica; Phosphate minerals; Potential energy; Structural geology; Temperature; Zircon; Eastward propagation; Fault-slip rates; Gravitational potential energy; Himalayan orogen; Low temperatures; Radial spreading; Temporal and spatial pattern; Thermochronology; Fault slips; deformation mechanism; extensional tectonics; plate convergence; plate tectonics; Pliocene; rifting; slip rate; tectonic setting; thermochronology; China; Cona-Oiga Rift Zone; Himalayas; Xizang; Xizang
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/202487
作者单位	Key Laboratory of Geoscience Big Data and Deep Resource of Zhejiang Province, School of Earth Sciences, Zhejiang University, Hangzhou, 310027, China; Research Center for Structures in Oil and Gas Bearing Basins, Ministry of Education, Hangzhou, 310027, China; Nevada Bureau of Mines and Geology, University of Nevada, Reno, NV 89557, United States; School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou, 510275, China; School of Earth and Space Sciences, Peking University, Beijing, 100871, China; Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China; Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, 100029, China; College of Earth Sciences, Jilin University, Changchun, 130061, China
推荐引用方式 GB/T 7714	Bian S.,Gong J.,Zuza A.V.,et al. Late Pliocene onset of the Cona rift, eastern Himalaya, confirms eastward propagation of extension in Himalayan-Tibetan orogen[J],2020,544.
APA	Bian S..,Gong J..,Zuza A.V..,Yang R..,Tian Y..,...&Yu X..(2020).Late Pliocene onset of the Cona rift, eastern Himalaya, confirms eastward propagation of extension in Himalayan-Tibetan orogen.Earth and Planetary Science Letters,544.
MLA	Bian S.,et al."Late Pliocene onset of the Cona rift, eastern Himalaya, confirms eastward propagation of extension in Himalayan-Tibetan orogen".Earth and Planetary Science Letters 544(2020).